cmd/govulncheck: update call stack definition
cmd/govulncheck: update call stack definition

Change-Id: Ie641dffa9583199f676c473a5a7fc6a55f8b83a8
Reviewed-on: https://go-review.googlesource.com/c/vuln/+/428034
Reviewed-by: Julie Qiu <e6cb64861edcc38971590ff27c111e0e672de045@google.com>
Reviewed-by: Jonathan Amsterdam <e3d3698b2ccd5955e4adf250d0785062d0f9018b@google.com>

golang/vuln,golang/vuln